double up
phrasal verb with double verb [ I or T ] uk/ˈdʌb.əl/ us/ˈdʌb.əl/
与他人共用（尤指房间）
to share something, especially a room, with someone else
Terry will have to double up with Bill in the front bedroom. 特里只好与比尔一起睡在前面的卧室里了。
收到两倍；使用两倍
to receive or use two of something
Matt Damon doubled up, winning two Oscars that night. 麥特·戴蒙再次胜出，那晚获得了两项奥斯卡奖。